If you're in a pinch and need a new copy of your car key, Ace Hardware may be the better alternative over the dealership, but it depends on what car you own.

If you've ever wondered what the circle arrow button on your key fob is for but were too embarrassed to ask your mechanic or dealership, here's the simple truth: it remotely starts your car.

If you have a key fob and have ever been curious about the circle arrow button and its function, here's what it means.